Method getProjection

src/layer.js:453–486

* For "local" content, getProjection will use content of "this" * For "remote" content, you need to pass the shadowRoot to search through

()

   * For "remote" content, you need to pass the shadowRoot to search through
   */
  getProjection() {
    let mapml = this.src ? this.shadowRoot : this;
    let projection = this.parentElement.projection;
    if (mapml.querySelector('map-meta[name=projection][content]')) {
      projection =
        Util._metaContentToObject(
          mapml
            .querySelector('map-meta[name=projection]')
            .getAttribute('content')
        ).content || projection;
    } else if (mapml.querySelector('map-extent[units]')) {
      const getProjectionFrom = (extents) => {
        let extentProj = extents[0].attributes.units.value;
        let isMatch = true;
        for (let i = 0; i < extents.length; i++) {
          if (extentProj !== extents[i].attributes.units.value) {
            isMatch = false;
          }
        }
        return isMatch ? extentProj : null;
      };
      projection =
        getProjectionFrom(
          Array.from(mapml.querySelectorAll('map-extent[units]'))
        ) || projection;
    } else {
      const message = `A projection was not assigned to the '${mapml.label}' Layer. \nPlease specify a projection for that layer using a map-meta element. \nSee more here - https://maps4html.org/web-map-doc/docs/elements/meta/`;
      if (!this.loggedMessages.has(message)) {
        console.log(message);
        this.loggedMessages.add(message);
      }
    }
    return projection;
  }
  /*
   * Runs the effects of the mutation observer for child elements of map-layer.
   * This method primarily handles extent recalculation and other